Factual error: When Dick is purchasing his lunch, the cashier tells him the total is $3.75 and he incredulously lays down another coin because he thought his total was going to be $3.50. When he walks away with his tray, you can see that he paid for the meal with 4 coins. Unless he paid with silver dollars (the Sacajawea dollar had not been minted yet) then there is no way he could have covered the $3.75 with just 4 coins. And if he did pay with silver dollars then it would have been completely out of character for him to not have gotten any change, seeing how the show has established him as a cheapskate, as well as he would definitely get change seeing as how upset he was at having to pay an additional 25 cents for his meal.

When Sonja takes Dick's belt, she has it in her right hand, away from Dick. In the next few shots, Sonja no longer has the belt, but it is back around Dick's pants. Yet the next shot (at the door), it's in Dick's hand.

When the Solomons meet the Big Giant Head at the airport and ask how his flight was, he says that it was horrible because when he looked out the airplane window, he saw something on the wing of the plane. Dick responds that the same thing happened to him. William Shatner appeared in the 1960's Twilight Zone episode "Nightmare at 20,000 Feet" in which a gremlin tried to destroy the wing of a plane. John Lithgow appeared in "Twilight Zone: The Movie" playing the same character in the same situation.